Answer:

Step-by-step explanation:
We have to fill the blank.
The number of permutations of n elements taken r at a time is given by the formula:

Permutation is an arrangement of subsets of a larger set in regard with order of the arrangement.
where n is the the larger set and we have to choose r items from n such that there is no repetition.
In permutation, order is important.
Answer:
x=15
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
9x−38+4x+23=180
9x+−38+4x+23=180
(9x+4x)+(−38+23)=180(Combine Like Terms)
13x+−15=180
13x−15=180
Step 2: Add 15 to both sides.
13x−15+15=180+15
13x=195
Step 3: Divide both sides by 13.
13x/13=195/13
-7/2n = 49
First, we need to simplify 7/2n to 7n/2. This will make the problem easier to solve.

Second, since we are trying to get the variable (x) by itself on one side of the problem to equal something, we can start off by multiplying each side by 2. This will get rid of our fraction.

Third, we can go ahead and multiply 49 × 2, which is easily done by a calculator, etc. The answer to 49 × 2 is 98.

Fourth, let's now divide each side by -7. This will recreate a fraction but we can get our answer very easily from now. Go ahead and put the negative sign in front of the fraction as well.
Fifth, our last step is to simplify the fraction. Basically, ask yourself 'what can be multiplied by 7 to equal 98? Or, 98 ÷ 7. The answer either way is 14 (don't forget your negative).

Answer:
Answer:
situational
Step-by-step explanation:
Based on the information provided within the question it seems that Leon's teacher made a situational attribution about his test performance. This term refers to when certain people believe that an individual's actions or behaviors are caused by a specific or various situational factors. Which is what his teacher is thinking by believing that his performance was affected by some problem or sickness (situational factors).
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